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미세 딤플의 위치와 수가 Laser Texturing한 평행 스러스트 베어링의 윤활특성에 미치는 영향
황윤건(Y. G. Hwang),김관준(K. J. Kim),박태조(T. J. Park) 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.5
In the last decade, Laser surface texturing (LST) has emerged as a viable option of surface engineering. Many problems related with mechanical components such as thrust bearings, mechanical face seals and piston rings, etc, LST result in significant improvement in load capacity, wear resistance and reduction in friction force. It is mainly experimentally reported the micro-dimpled bearing surfaces can reduce friction force, however, precise theoretical results are not presented until now. In this paper, a commercial computational fluid dynamics(CFD) code, FLUENT is used to investigate the lubrication characteristics of a parallel thrust bearing having 3-dimensional micro-dimple. The results show that the pressure, velocity and density distributions within dimples are highly affected by location and number of dimple. The numerical method adopted in this paper and results can be use in design of optimum dimple characteristics.